90226768091 has 2 divisors, whose sum is σ = 90226768092. Its totient is φ = 90226768090.

The previous prime is 90226768087. The next prime is 90226768097. The reversal of 90226768091 is 19086762209.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (19086762209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90226768091 - 2² = 90226768087 is a prime.

It is not a weakly prime, because it can be changed into another prime (90226768097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45113384045 + 45113384046.

It is an arithmetic number, because the mean of its divisors is an integer number (45113384046).

Almost surely, 2^90226768091 is an apocalyptic number.

90226768091 is a deficient number, since it is larger than the sum of its proper divisors (1).

90226768091 is an equidigital number, since it uses as much as digits as its factorization.

90226768091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 90226768091 in words is "ninety billion, two hundred twenty-six million, seven hundred sixty-eight thousand, ninety-one".